Other Useful Links
ESRI SOFTWARE
http://www.esri.com/
ILLINOIS GIS ASSOCIATION (ILGISA)
http://www.ilgisa.org/
ILLINOIS NATURAL RESOURCES GEOSPATIAL DATA CLEARINGHOUSE
http://www.isgs.uiuc.edu/nsdihome/
USDA/NRCS GEOSPATIAL DATA GATEWAY
http://datagateway.nrcs.usda.gov/
SOIL SURVEY OF LOGAN COUNTY
http://soildatamart.nrcs.usda.gov/manuscripts/IL107/0/Logan_IL.pdf
OTHER COUNTY GIS SITES
http://www.gis2gps.com/GIS/illcounties/illcounties.html
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